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    pyrometer temps

    The only "normal" that's important at is the upper end. My opinion is that 900 sustained is the upper limit for a strong engine, with short spurts to 1150 when honor is on the line... but only for engine in good condition. The engineers from our truck's era used to say that 500 degrees at...
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    Tire Sizing Question

    Oh, they mount up OK but you won't get the full life out of the tires that way, nor the optimal handling. It's something you might not notice until it's really important. There is a good reason for the rim width recommendations!
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    Tire Sizing Question

    No issues at all, really. The drop in rpm is under 100. What mpg you gain from the rpm drop you lose to the increased rolling resistance. You can't mount them on the original rims, of course. You have to have a minimum of about 7.5-inches. There are a couple of 255/85 tires (google) which might...
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    Tire Sizing Question

    Well, the 245/75R15 are a little shorter than the 235/85R16 (30.5 vs 31.7). That's a generic measurement since each individual type model has it's own slightly different dimension. A 265/75R16 is at 31.6" so it's effectively the same rolling diameter. A 285/70R16 (the size I have had for about...
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    Steering gear problems

    They aren't terribly hard to rebuild yourself. Did mine back in '99 (hasn't leaked since!) but then I had been trained to do Ford boxes when I worked at a dealership in the early/mid '80s and later to do Range Rover boxes in the late '80s and early '90s when I was a Land Rover tech. The service...
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    Coolant issues...

    Don't forget Fleet Charge (By Peak) which is found in TSC stores and Rural King.
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    86 f250 6.9 rebuild/refresh advice and questions

    There are online calculators to help you with CR calculations. Google is your friend. I'll leave you with one more word of caution and then I'll stop being an old woman. If time and money are a factor, think how they are going to be impacted if things go wrong.
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    86 f250 6.9 rebuild/refresh advice and questions

    I have a Banks (1st Gen installed in 1987) too and studded the engine during the overhaul. The boost really adds strongly to the list of good reasons to do something with the pistons to make sure the CR isn't too high. Add more air to a cylinder thane compress it even more than normal... that...
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    86 f250 6.9 rebuild/refresh advice and questions

    I went thru this with the heads but not the block in 2009. Head data is below and note minimum head thickness. Mine ended up at around 4.785" but as long as the valve recession is correct, you don't have to worry about hitting the piston with the valves, as several said above. The block is more...
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    OEM head gaskets

    There were service problems with some of the old head gaskets.. at least under the Ford banner. In my '86 truck era, they were known for oil or coolant seepage. Happened to me back in the day and I had to change them. If it were me, I'd try to find the date/era before considering their use...
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    So just how much does a turbo help? Pics too!

    The "50%" increase is for aftermarket turbo systems, which use more aggressive fuel settings and a bit more boost (6-7 on the factory IDI turbo stock vs 10+ on the aftermarket). Ford deliberately detuned the IDI turbo for various reasons: a warranty safety factor being the main one. Also, the...
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    Aftermarket ATF cooler; how much is too much?

    You might be doing this backwards. Why add a cooler if you don't know that you really need one? Step one: Install trans temp gauge. Step Two: Monitor temps for a period of time. Step Three: Add appropriate "Just Right" cooler. I have temp gauges on both my trucks. The IDI temp gauge has...
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    Erratic oil pressure ideas. Have aftermarket gauge.

    Sounds like you are on top of it then. Good man! I was just making sure so we wouldn't have to agonize over hearing your engine had burned up sometime down the road because a hose failed.
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    Erratic oil pressure ideas. Have aftermarket gauge.

    Bear in mind that your engine's LIFE rests with a short piece of cheap hose and two 50 cent hose clamps. Is the hose up to years of heat and chemicals? Will the clamps loosen and leak? High quality braided hose with fitting crimped in are usually chose for vital tasks like this. If that hose...
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    6.9 weight??

    I have several old engine swap books that say 675-685 for a BBC. They don't specify much in the way of configuration.
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    6.9 weight??

    On more tidbit. Te initial press release for the 6.9L by IH in 1982 list 780 lbs. as the weight of a dry engine without flywheel housing, flywheel, alternator starter or fuel filters.
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    6.9 weight??

    Most of the brackets and pulleys were onboard, water pump, some of the turbo bracketry, flex plate, exhaust manifolds and the Banks turbo mount that bolts to the back of the head. No alt, starter., PS or AC but most of their brackets were on. Oil and oil filter were on/in. Wiring harness was on...
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    6.9 weight??

    My Ford Data Books list 860 lbs for a dry 6.9L NA and 900 lbs. for the 7.3L turbo. I weighed my 6.9L as I was installing it (have a line dyno) and it was a scratch under 900 with oil in in and some of the turbo stuff installed. 6.2/6.5??? IMO (and I had one for about 8 years) is a good light...
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    Is break in oil needed on a rebuilt 7.3

    That's an astute question! The rockers are the place on an IDI where zinc is most needed because it's mostly boundary lubrication, not hydrodynamic there. There is more than enough ZDDP in a good HDEO for that, IMO. I think the key to the rockers is to use a good high-zinc assembly lube or at...
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    Is break in oil needed on a rebuilt 7.3

    No special break in oil needed for our engines. The reason for an early oil change is to catch break in materials but mostly the grunge left by the guy who assembled the engine. How necessary a "flush" type early oil change is depends on how clean the assembler was and the way the...
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    Turbo time thanks to head gasket leak

    ... Yeah and then he told me about how "suddenly" FOrd comes up with this great idea after they had torn the sheets!
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    Turbo time thanks to head gasket leak

    I was talking to a retired engineer from the Navistar engine plant in Indy and at some point before the 6.0L came out, Navistar built some really nifty prototype engines and presented them to Ford as a possible replacement for the 7.3 PSD. One of them had the exhaust ports at the top of the...
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    So just how much does a turbo help? Pics too!

    Yeah, I think they also use that fan for helicopter tail rotors! ( : < )
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    So just how much does a turbo help? Pics too!

    I agree, the difference turbo and non is like magic. In the era of my 1st Gen Banks, Power and torque were rated by Ford at 170 hp and 315 lbs-ft at the flywheel. In 1987, Banks rated their 6.9 kit at up to 255 hp and 550 lbs-ft at the flywheel (I say "up to" because they had two fuel settings...
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    NEED MORE BOOST

    Okay, but going back to the OP's problem, wouldn't dialing back the fuel some or a lot bring down his terminal EGTs until such time as he upgrades his turbo setup to match his 100cc pump?

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